Observation of coinciding arctic boundary layer ozone depletion and snow surface emissions of nitrous acid
Observation of coinciding arctic boundary layer ozone depletion and snow surface emissions of nitrous acid
复制标题
北极边界层臭氧消耗与雪面亚硝酸排放同时发生的观测
DOI：
10.1016/j.atmosenv.2005.11.027
复制
发表时间：
2006
影响因子：
5
通讯作者：
I. Allegrini
中科院分区：
文献类型：
--
作者：
A. Amoroso;H. Beine;R. Sparapani;M. Nardino;I. Allegrini
在斯瓦尔巴特群岛的Ny-Svallesund，在春季的雪表面-大气交换通量的亚硝酸的测量证实了早期的研究结果，没有显着的排放发生在碱性雪表面在这个海洋高北极位置。2004年4月29日，来自北极的空气带来了臭氧枯竭的空气和大量降雪。在那一天，我们观测到HONO的发射通量高达40 nmolm − 2 h −1。这些发射是由两种独立现象的结合而成的。酸性雪允许NO3−离子运输到光化学反应区域，并从雪间隙空气中释放产生的HONO;而臭氧的缺乏可能会增加HONO/NO分数，超过雪间隙空气中的NO2。
Measurements of snow surface—atmosphere exchange fluxes of nitrous acid at Ny-Ålesund, Svalbard during springtime confirmed earlier findings that no significant emissions occurred from alkaline snow surfaces at this marine high Arctic location. On 29 April 2004 air arriving from the North Pole brought both ozone depleted air and significant snowfall. On that day we observed HONO emission fluxes of up to 40nmolm−2h−1. These emissions were made possible by the combination of two independent phenomena. The acidic snow allowed the transport of NO3−ions to photochemically reactive areas and the release of produced HONO from the snow interstitial air; while the absence of ozone likely increased the HONO/NO fraction over that of NO2in the snow interstitial air.